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Thread: TOTO - TSTA Thermostatic Mixing Valve?

  1. #1

    Default TOTO - TSTA Thermostatic Mixing Valve?

    I purchased and installed a TOTO "TSTA" Single Volume Control, Thermostatic Mixing Valve. Unfortunately I've found out since that this valve supplies only the shower and an auxiliary outlet. I should have purchased the TSTD valve which supplies shower and tub. Does anyone know if a TSTD cartridge will fit a TSTA valve or if there is any way I can cause the TSTA valve to supply the shower and tub independently? There is an auxiliary outlet for a hand/body spray but it appears that position supplies both shower and hand spray at the same time. I need one or the other, not both.
    Thank you

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default valve

    You install a "twin ell" below the valve. The large side opening goes to the diverter spout, the "front" top opening connects to the valve, and the rear top opening goes up to the shower.


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